Documentation/frv/configuring.txt

   1                    =======================================
   2                    FUJITSU FR-V LINUX KERNEL CONFIGURATION
   3                    =======================================
   4
   5 =====================
   6 CONFIGURATION OPTIONS
   7 =====================
   8
   9 The most important setting is in the "MMU support options" tab (the first
  10 presented in the configuration tools available):
  11
  12  (*) "Kernel Type"
  13
  14      This options allows selection of normal, MMU-requiring linux, and uClinux
  15      (which doesn't require an MMU and doesn't have inter-process protection).
  16
  17 There are a number of settings in the "Processor type and features" section of
  18 the kernel configuration that need to be considered.
  19
  20  (*) "CPU"
  21
  22      The register and instruction sets at the core of the processor. This can
  23      only be set to "FR40x/45x/55x" at the moment - but this permits usage of
  24      the kernel with MB93091 CB10, CB11, CB30, CB41, CB60, CB70 and CB451
  25      CPU boards, and with the MB93093 PDK board.
  26
  27  (*) "System"
  28
  29      This option allows a choice of basic system. This governs the peripherals
  30      that are expected to be available.
  31
  32  (*) "Motherboard"
  33
  34      This specifies the type of motherboard being used, and the peripherals
  35      upon it. Currently only "MB93090-MB00" can be set here.
  36
  37  (*) "Default cache-write mode"
  38
  39      This controls the initial data cache write management mode. By default
  40      Write-Through is selected, but Write-Back (Copy-Back) can also be
  41      selected. This can be changed dynamically once the kernel is running (see
  42      features.txt).
  43
  44 There are some architecture specific configuration options in the "General
  45 Setup" section of the kernel configuration too:
  46
  47  (*) "Reserve memory uncached for (PCI) DMA"
  48
  49      This requests that a uClinux kernel set aside some memory in an uncached
  50      window for the use as consistent DMA memory (mainly for PCI). At least a
  51      megabyte will be allocated in this way, possibly more. Any memory so
  52      reserved will not be available for normal allocations.
  53
  54  (*) "Kernel support for ELF-FDPIC binaries"
  55
  56      This enables the binary-format driver for the new FDPIC ELF binaries that
  57      this platform normally uses. These binaries are totally relocatable -
  58      their separate sections can relocated independently, allowing them to be
  59      shared on uClinux where possible. This should normally be enabled.
  60
  61  (*) "Kernel image protection"
  62
  63      This makes the protection register governing access to the core kernel
  64      image prohibit access by userspace programs. This option is available on
  65      uClinux only.
  66
  67 There are also a number of settings in the "Kernel Hacking" section of the
  68 kernel configuration especially for debugging a kernel on this
  69 architecture. See the "gdbstub.txt" file for information about those.
  70
  71
  72 ======================
  73 DEFAULT CONFIGURATIONS
  74 ======================
  75
  76 The kernel sources include a number of example default configurations:
  77
  78  (*) defconfig-mb93091
  79
  80      Default configuration for the MB93091-VDK with both CPU board and
  81      MB93090-MB00 motherboard running uClinux.
  82
  83
  84  (*) defconfig-mb93091-fb
  85
  86      Default configuration for the MB93091-VDK with CPU board,
  87      MB93090-MB00 motherboard, and DAV board running uClinux.
  88      Includes framebuffer driver.
  89
  90
  91  (*) defconfig-mb93093
  92
  93      Default configuration for the MB93093-PDK board running uClinux.
  94
  95
  96  (*) defconfig-cb70-standalone
  97
  98      Default configuration for the MB93091-VDK with only CB70 CPU board
  99      running uClinux. This will use the CB70's DM9000 for network access.
 100
 101
 102  (*) defconfig-mmu
 103
 104      Default configuration for the MB93091-VDK with both CB451 CPU board and
 105      MB93090-MB00 motherboard running MMU linux.
 106
 107  (*) defconfig-mmu-audio
 108
 109      Default configuration for the MB93091-VDK with CB451 CPU board, DAV
 110      board, and MB93090-MB00 motherboard running MMU linux. Includes
 111      audio driver.
 112
 113  (*) defconfig-mmu-fb
 114
 115      Default configuration for the MB93091-VDK with CB451 CPU board, DAV
 116      board, and MB93090-MB00 motherboard running MMU linux. Includes
 117      framebuffer driver.
 118
 119  (*) defconfig-mmu-standalone
 120
 121      Default configuration for the MB93091-VDK with only CB451 CPU board
 122      running MMU linux.
 123
 124
 125